verb.
In either a sequel or patch to an existing video game, this term is used to describe when the game developers weaken a skill, class, attack, character, item, or any other game element (ab)used by players in an attempt to balance the game, to the point of rendering said elements useless.

1. What the fuck?! Sonic is WAY too fast in Brawl. They seriously need to nuke that shit.

2. Great...They nuked the most popular armor in the game. Now I have to find a way to get rid of all this junk sitting in my shop.

3. SOE nuked Star Wars Galaxies in 2005 by getting rid of the most brilliant skill advancement system ever created and turning it into a point-and-click shoot-em-up game.

4. Valve nuked the Scout in the Source version of Counter-Strike. It was SO much better in 1.6.

To turn off an electrical appliance or device (esp. Computers or Tv's) by cutting its power; either by pulling the plug out of the socket or flipping the switch, instead of following standard procudure (running Shutdown, pushing the power button). Nuking can happen accidentally or deliberatly.

To cook something in a microwave oven. "Neuked" to have been cooked in the microwave. Neuking-the act of being cooked in the microwave.(Note the spelling change when the word becomes a verb or adjective)
Derived from the common belief that Microwaves were like Neuclear Power and had supernatural properties that could bring Frozen meals to life in a matter of seconds.